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AC field induced quantum rectification effect in tunnel junctions

M. V. Fistul·A. E. Miroshnichenko·S. Flach
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Abstract

We study the appearance of directed current in tunnel junctions, quantum ratchet effect, in the presence of an external ac field f(t). The current is established in a one-dimensional discrete inhomogeneous "tight-binding model". By making use of a symmetry analysis we predict the right choice of f(t) and obtain the directed current as a difference between electron transmission coefficients in opposite directions, $ΔT = T^{LR}-T^{RL}$. Numerical simulations confirm the predictions of the symmetry analysis and moreover, show that the directed current can be drastically increased by a proper choice of frequency and amplitudes of the ac field f(t).

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M. V. Fistul, A. E. Miroshnichenko, S. Flach. 2003-09-12. AC field induced quantum rectification effect in tunnel junctions. https://doi.org/10.1103/physrevb.68.153107

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